This one you can't blame on the journalists. Not entirely, at least: they couldn't possibly have resisted the bait. After all, everyone knows that reporters are hard-wired to respond to the chance to write stories about casual sex. (That would be the sleaze gene.) So when the lead investigator of a study published in PLoS ONE gives them a really juicy nugget, how do you think they'd react? Here's the crucial quote:

"What we found was that individuals with a certain variant of the DRD4 gene were more likely to have a history of uncommitted sex, including one-night stands and acts of infidelity."

Science Daily at least printed the whole thing, and much more detail. But MSNBC.com went straight to the obvious simplification, with this headline:

Associations between Dopamine D4 Receptor Gene Variation with Both Infidelity and Sexual Promiscuity

The study covered 181 individuals, 43 of whom had a particular variation of the DRD4 gene, which has previously been associated with ADHD, alcoholism and various types of risk taking. These subjects "report a greater categorical rate of promiscuous sexual behavior (i.e., having ever had a 'one-night stand') and report a more than 50% increase in instances of sexual infidelity."

It is important, wrote the study's authors, "to sound several notes of caution." There may be alternative explanations, the findings are "not definitive at this point," the behavioral outcomes are "probabilistic and by no means deterministic" and there may be cultural influences. (The research subjects were "recruited from a midsized state university in the northeastern United States," possibly not a million miles from Binghampton University, NY, where the authors mostly work.)

OK, they're covered, technically. But do they have to throw terms like "one-night stand" at the hungry press? Is funding really down to this level now?